Method and apparatus for spectrum sharing operation in multiple wireless communication systems

Abstract

A method performed by a first Base Station (BS) in a wireless communication system, includes: receiving second network information of a second BS from the second BS of the wireless communication system, wherein the first BS supports a wireless access scheme that is different from a wireless access scheme of the second BS and shares a same frequency band with the second BS; determining a resource allocation ratio between the first BS and the second BS according to a predefined resource allocation scheme based on first network information of the first BS and the second network information of the second BS; and transmitting information on the resource allocation ratio to the second BS.

What is claimed is: 
     
         1 . A method performed by a first base station (BS) in a wireless communication system, the method comprising:
 receiving second network information of a second BS from the second BS in the wireless communication system, wherein the first BS supports a wireless access scheme that is different from a wireless access scheme of the second BS and shares a same frequency band with the second BS;   determining a resource allocation ratio between the first BS and the second BS according to a predefined resource allocation scheme based on first network information of the first BS and the second network information of the second BS; and   transmitting information on the resource allocation ratio to the second BS.   
     
     
         2 . The method of  claim 1 , wherein the first network information comprises at least one of information on a number of terminals connected to the first BS, information on an amount of data accumulated in a buffer of at least one terminal of the terminals connected to the first BS, or information on an amount of resources used for data transmission of the first BS, and
 wherein the second network information comprises at least one of information on a number of terminals connected to the second BS, information on an amount of data accumulated in a buffer of at least one terminal of the terminals connected to the second BS, or information on an amount of resources used for data transmission of the second BS.   
     
     
         3 . The method of  claim 2 , wherein the determining the resource allocation ratio comprises determining a state for the wireless communication system based on the information on the amount of data accumulated in the buffer of the at least one terminal of the terminals connected to the first BS and the information on the amount of data accumulated in the buffer of the at least one terminal of the terminals connected to the second BS. 
     
     
         4 . The method of  claim 3 , wherein the state is one of:
 a first state in which a number of heavy Buffer Occupancy (BO) terminals connected to the first BS and a number of heavy BO terminals connected to the second BS are equal to or less than a first value;   a second state in which the number of heavy BO terminals connected to the first BS exceeds the first value and the number of heavy BO terminals connected to the second BS is less than or equal to the first value;   a third state in which the number of heavy BO terminals connected to the first BS is less than or equal to the first value and the number of heavy BO terminals connected to the second BS exceeds the first value; and   a fourth state in which the number of heavy BO terminals connected to the first BS and the number of heavy BO terminals connected to the second BS exceed the first value, and   wherein a heavy BO terminal is determined based on whether the amount of data accumulated in a buffer of a corresponding terminal exceeds a specific threshold.   
     
     
         5 . The method of  claim 4 , wherein the determining the resource allocation ratio comprises, in case that the state is changed, the first state is maintained, or the fourth state is maintained:
 determining a ratio of terminals between the first BS and the second BS based on the information on the number of terminals connected to the first BS and the information on the number of terminals connected to the second BS; and   determining the resource allocation ratio between the first BS and the second BS based on the determined ratio of terminals.   
     
     
         6 . The method of  claim 4 , wherein the determining the resource allocation ratio comprises, in case that the second state is maintained:
 determining an amount of remaining resources for the second BS based on the information on the amount of resources used for data transmission of the second BS; and   tuning the resource allocation ratio between the first BS and the second BS based on the amount of remaining resources.   
     
     
         7 . The method of  claim 4 , wherein the determining the resource allocation ratio comprises, in case that the third state is maintained:
 determining an amount of remaining resources for the first BS based on the information on the amount of resources used for data transmission of the first BS; and   tuning the resource allocation ratio between the first BS and the second BS based on the amount of remaining resources.   
     
     
         8 . The method of  claim 1 , wherein the first BS corresponds to a Long Term Evolution (LTE) BS supporting an LTE wireless access scheme, and the second BS corresponds to a New Radio (NR) BS supporting an NR wireless access scheme. 
     
     
         9 . A first base station (BS) in a wireless communication system, the first BS comprising:
 a transceiver; and   a processor coupled to the transceiver and configured to: 
 receive second network information of a second BS from the second BS in the wireless communication system, wherein the first BS supports a wireless access scheme that is different from a wireless access scheme of the second BS and shares a same frequency band with the second BS; 
 determine a resource allocation ratio between the first BS and the second BS according to a predefined resource allocation scheme based on first network information of the first BS and the second network information of the second BS; and 
 transmit information on the resource allocation ratio to the second BS. 
   
     
     
         10 . The first BS of  claim 9 , wherein the first network information comprises at least one of information on a number of terminals connected to the first BS, information on an amount of data accumulated in a buffer of at least one terminal of the terminals connected to the first BS, or information on an amount of resources used for data transmission of the first BS, and
 wherein the second network information comprises at least one of information on a number of terminals connected to the second BS, information on an amount of data accumulated in a buffer of at least one terminal of the terminals connected to the second BS, or information on an amount of resources used for data transmission of the second BS.   
     
     
         11 . The first BS of  claim 10 , wherein the processor is further configured to determine a state for the wireless communication system based on the information on the amount of data accumulated in the buffer of the at least one terminal of the terminals connected to the first BS and the information on the amount of data accumulated in the buffer of the at least one terminal of the terminals connected to the second BS. 
     
     
         12 . The first BS of  claim 11 , wherein the state is one of:
 a first state in which a number of heavy Buffer Occupancy (BO) terminals connected to the first BS and a number of heavy BO terminals connected to the second BS are equal to or less than a first value;   a second state in which the number of heavy BO terminals connected to the first BS exceeds the first value and the number of heavy BO terminals connected to the second BS is less than or equal to the first value;   a third state in which the number of heavy BO terminals connected to the first BS is less than or equal to the first value and the number of heavy BO terminals connected to the second BS exceeds the first value; and   a fourth state in which the number of heavy BO terminals connected to the first BS and the number of heavy BO terminals connected to the second BS exceed the first value, and   wherein a heavy BO terminal is determined based on whether the amount of data accumulated in a buffer of a corresponding terminal exceeds a specific threshold.   
     
     
         13 . The first BS of  claim 12 , wherein the processor is further configured to, in case that the state is changed, the first state is maintained, or the fourth state is maintained:
 determine a ratio of terminals between the first BS and the second BS based on the information on the number of terminals connected to the first BS and the information on the number of terminals connected to the second BS; and   determine the resource allocation ratio between the first BS and the second BS based on the determined ratio of terminals.   
     
     
         14 . The first BS of  claim 12 , wherein the processor is further configured to, in case that the second state is maintained:
 determine an amount of remaining resources for the second BS based on the information on the amount of resources used for data transmission of the second BS; and   tune the resource allocation ratio between the first BS and the second BS based on the amount of remaining resources.   
     
     
         15 . The first BS of  claim 12 , wherein the processor is further configured to, in case that the third state is maintained:
 determine an amount of remaining resources for the first BS based on the information on the amount of resources used for data transmission of the first BS; and   tune the resource allocation ratio between the first BS and the second BS based on the amount of remaining resources.   
     
     
         16 . The first BS of  claim 9 , wherein the first BS corresponds to a LTE BS supporting an LTE wireless access scheme, and the second BS corresponds to a New Radio (NR) BS supporting an NR wireless access scheme. 
     
     
         17 . A non-transitory computer-readable storage medium storing instructions which, when executed by a processor of a first base station in a wireless communication system, cause the first base station to perform operations comprising:
 receiving second network information of a second BS from the second BS in the wireless communication system, wherein the first BS supports a wireless access scheme that is different from a wireless access scheme of the second BS and shares a same frequency band with the second BS;   determining a resource allocation ratio between the first BS and the second BS according to a predefined resource allocation scheme based on first network information of the first BS and the second network information of the second BS; and   transmitting information on the resource allocation ratio to the second BS.   
     
     
         18 . The non-transitory computer-readable storage medium of  claim 17 , wherein the first network information comprises at least one of information on a number of terminals connected to the first BS, information on an amount of data accumulated in a buffer of at least one terminal of the terminals connected to the first BS, or information on an amount of resources used for data transmission of the first BS, and
 wherein the second network information comprises at least one of information on a number of terminals connected to the second BS, information on an amount of data accumulated in a buffer of at least one terminal of the terminals connected to the second BS, or information on an amount of resources used for data transmission of the second BS.   
     
     
         19 . The non-transitory computer-readable storage medium of  claim 18 , wherein the determining the resource allocation ratio comprises determining a state for the wireless communication system based on the information on the amount of data accumulated in the buffer of the at least one terminal of the terminals connected to the first BS and the information on the amount of data accumulated in the buffer of the at least one terminal of the terminals connected to the second BS. 
     
     
         20 . The non-transitory computer-readable storage medium of  claim 19 , wherein the state is one of:
 a first state in which a number of heavy Buffer Occupancy (BO) terminals connected to the first BS and a number of heavy BO terminals connected to the second BS are equal to or less than a first value;   a second state in which the number of heavy BO terminals connected to the first BS exceeds the first value and the number of heavy BO terminals connected to the second BS is less than or equal to the first value;   a third state in which the number of heavy BO terminals connected to the first BS is less than or equal to the first value and the number of heavy BO terminals connected to the second BS exceeds the first value; and   a fourth state in which the number of heavy BO terminals connected to the first BS and the number of heavy BO terminals connected to the second BS exceed the first value, and   wherein a heavy BO terminal is determined based on whether the amount of data accumulated in a buffer of a corresponding terminal exceeds a specific threshold.